<!DOCTYPE html>
<html lang="en">

<head>
	<meta charset="UTF-8">
	<title>Title</title>
	<style>
		.container {
			height: 800px;
			width: 100%;
		}

		.bg {
			height: 300px;
			width: 100%;
			margin-top: 450px;
			border: #00cdcd 2px solid;
			background-image: url("../assets/image/demobac.png");
			background-position: bottom;
			background-attachment: fixed;
			background-repeat: no-repeat;
			overflow-y: scroll;
		}

		.bg>div {
			height: 1000px
		}
	</style>
</head>

<body>
	<div class="container">
		<div class="bg">
			<div></div>
		</div>
	</div>
</body>

</html>